RU178564U1 - EARTHING DEVICE - Google Patents

Abstract

The utility model relates to the field of electronic equipment and can be used in the design of blocks and components of products of electronic equipment (RES) on various objects-carriers of general engineering during installation in places with limited access, regardless of the group of equipment for shorting points of the electrical circuit (module, block) to the body of the carrier object, which should be under the ground potential. The technical result, to which the claimed technical solution is directed, is to increase the manufacturability of mounting the tip of the grounding cable on the head of the contact element in places with limited access, eliminating the displacement of the tip of the grounding cable. The achievement of the technical result is provided by a change in the design of the closest analogue. In contrast to the prototype, from the outer end of the head of the contact element, holes are made that are arranged in a row around the circumference, symmetrically to the central threaded hole, and the tip of the cable grounding bus is made with a latch located in the hole in the head of the contact element.

Description

The utility model relates to the field of electronic equipment and can be used in the design of blocks and components of products of electronic equipment (RES) on various objects-carriers of general engineering during installation in places with limited access, regardless of the group of equipment for shorting points of the electrical circuit (module, block) to the body of the carrier object, which should be under the ground potential.

The grounding clamp of the input device of an electric machine is known from the prior art (patent for invention RU No. 1527678, IPC H01R 4/30, 1989), comprising a support and a connecting bolt with washers and nuts. The connecting bolt is interchangeable with the possibility of longitudinal movement relative to the backup.

Known grounding clamp (patent for utility model RU No. 81385, IPC H01R 4/30, 2008) containing a connecting bolt with a washer and nut, a cantilever support with a longitudinal slot with a width equal to the diameter of the connecting bolt. One end of the support is fixed to the grounding device body, and stops are formed at the other end, which are formed by bending the free ends of the support. A cable lug with a neck width equal to the width of the slot in the support is placed under the connecting bolt. The clamping part of the cable lug is made in the form of a rectangular washer with collars that are equal in height to the thickness of the cantilever support, and the distance between the collars is equal to the width of the support.

The disadvantages of the above devices include the complexity of the design, significant contact resistance due to the number of transitions, as well as insufficiently effective electrical contact of the metal casing and tire tip under climatic and mechanical stresses.

A device is known (G. Roshchin, “Structural Structures, Mechanisms, and Mechanical Components of EVA” - M; Sov. Radio, 1980, pp. 199-200, Fig. 11.4b) containing a metal housing with a contact element screwed into a guide hole in the wall of the metal housing securing the mounting tab. In this case, the contact element is made in the form of a self-tapping screw with a countersunk head, followed by sealing the contact connection with a compound.

The disadvantages of the above devices include insufficiently effective electrical contact of the metal housing and the surface of the petal.

The closest in technical essence and the achieved results to the proposed technical solution is the grounding device (patent for utility model RU No. 145552, IPC H01R 4/66, H01R 4/38, 2014) containing a metal housing with a contact element made with a head and a cylindrical rod with a self-tapping thread on its side surface, screwed into a preliminary cylindrical hole in the wall of the metal casing, followed by sealing the contact connection with the compound. The contact element on the side of the outer end of the head is made with a central threaded hole or a threaded rod for attaching the tip of the ground bus, and the self-cutting thread on the cylindrical rod is made tapering on the peripheral turns, with the transition of the cylindrical rod into a truncated cone with a shank from the side of its outer end for the grounding wire . The diameter D of the cylinder of the rod and the diameter D1 of the protrusions of the self-tapping thread are in the following ratio:

D / D1 = 0.7 ... 0.9,

where D is the diameter of the cylinder of the rod;

D1 is the diameter of the protrusions of the self-tapping thread,

the metal case is made with a preliminary cylindrical hole in the wall with a diameter of d, determined by the following ratio:

d = 0.84-0.9D1,

where d is the diameter of the guide hole in the wall of the housing.

The technical problem solved by the creation of the claimed utility model is the lack of orientation of the tip of the cable grounding bus on the head of the contact element, which leads to the difficulty of installation in places with limited access, not excluding the displacement of the tip of the cable grounding bus.

The technical result, to which the claimed technical solution is directed, is to increase the manufacturability of mounting the tip of the grounding cable on the head of the contact element in places with limited access, eliminating the displacement of the tip of the grounding cable.

The achievement of the technical result is provided by a change in the design of the nearest analogue. In contrast to the prototype, from the outer end of the head of the contact element, holes are made that are arranged in a row around the circumference, symmetrically to the central threaded hole, and the tip of the cable grounding bus is made with a latch located in the hole in the head of the contact element.

The essence of the utility model is illustrated by drawings, where

FIG. 1 - grounding device with a contact element made with a Central threaded hole and with a shank;

FIG. 2 is a plan view of FIG. 1 (increased);

FIG. 3 - grounding device with a contact element made with a threaded rod;

FIG. 4 is a top view of the head of the contact element;

FIG. 5 - a metal tip of the grounding cable with a through hole, expanding to a free rounded blind edge;

FIG. 6 - a metal lug of a hook-shaped grounding cable with a through groove of a U-shaped contour, expanding to the free edge;

FIG. 7 is a section A-A of FIG. 6;

FIG. 8 - a metal lug of a fork-shaped ground cable for grounding with a through groove of a U-shaped contour, expanding towards the free edge;

The grounding device contains a metal housing 1 (Fig. 1, 2, 3), made, for example, of aluminum or magnesium alloy, in the wall of which a preliminary cylindrical hole is made, a ground cable 2 (Fig. 1, 2, 3, 5, 6 , 8) with a tip 3 (Fig. 1, 2, 3, 5, 6, 8) and a contact element 4 (Fig. 1).

The tip 3 of the cable grounding bus 2 can be performed

- expanding to a free rounded blind edge with a through hole (Fig. 5);

- expanding to the free rounded edge of the hook-shaped shape with a through groove of the U-shaped contour (Fig. 6);

- expanding towards the free edge of the fork-shaped with a through groove of the U-shaped contour (Fig. 8).

In this case, the tip 3 of the cable grounding bus 2 has a latch 5 (Fig. 1, 2, 3, 5, 6, 7, 8) in the form of a rectangular plate formed by a notch with subsequent bending.

The contact element 4 of the grounding device consists of a head 6 (Fig. 3, 4) and a stepwise adjacent rod 7 (Fig. 3) with a cylindrical lateral surface turning into the lateral surface of the truncated cone, from the outer end of which the shank 8 can adjoin ( Fig. 3), directed along the axis on which the ground wire 9 is fixed (Fig. 3), for example by soldering. On the cylindrical lateral surface of the rod 7 of the contact element 4, a self-tapping thread is made.

From the side of the outer end of the head 6 of the contact element 4, blind cylindrical holes 10 (Figs. 1, 3, 4) are additionally arranged, arranged around the circumference (Fig. 4) with a certain pitch, for example, 60 ° symmetrically to the central threaded hole 11 (Fig. 4 ) or a threaded rod 12 (Fig. 3), providing placement of the retainer 5 of the tip 3 of the cable grounding bus 2.

The tip 3 of the cable grounding bus 2 is fixed on the head 6 of the contact element 4 by a screw 13 (Fig. 1), screwed into its central threaded hole 11 or a nut 14 (Fig. 3) split spring, screwed on its threaded rod 12, while the retainer 5 the tip 3 of the cable grounding bus 2 is placed in one of the blind cylindrical holes 10 of the head 6 of the contact element 4.

The presence of the latch 5 on the tip 3 of the cable grounding bus 2 increases the manufacturability of its installation on the head 6 of the contact element 4 in places with limited access, excluding displacement.

To provide additional reliability and stability to climatic and mechanical influences of the contact connection of the grounding device, it is possible to seal it with compound 15 (Fig. 1) from one or two wall surfaces of the metal housing 1.

Claims (7)

A grounding device containing a metal housing with a contact element made with a head and a cylindrical rod with a self-cutting thread on its side surface screwed into a cylindrical hole in the wall of the metal case, the contact element on the side of the outer end of the head is made with a central threaded hole for attaching the tip of the ground bus and the self-tapping thread on the cylindrical rod is made tapering on the peripheral turns, with the transition of the cylindrical rod to truncated th cone with a shank on the side of its outer end for the ground wire, while the diameter D of the cylindrical rod and the diameter D1 of the protrusions of the self-tapping thread are in the following ratio: D / D1 = 0.7 ... 0.9, where D is the diameter of the cylindrical rod, D1 is the diameter of the protrusions of the self-tapping thread, the metal case is made with a cylindrical hole in the wall with a diameter d, determined by the following ratio: d = (0.84-0.9) D1, where d is the diameter of the cylindrical hole in the wall of the housing, followed by sealing the contact connection with a compound, characterized in that on the side of the outer end of the head of the contact element there are holes arranged in a row in a circle symmetrically to the central threaded hole, and the tip of the grounding bus bar is made with a latch placed in the hole of the head of the contact element.

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